Improvement in nut-locks



.|.'S. HILLARD.

Improvement in Nut-Locks.

N0. 132,079, Patented Oct. 8, 1872.

Tigi i ik Eig-2 f 4'/ f y ML2) L \B l y /fz UNITED STATESv PATENTOFFICE.

GEORGE s. EILLARD, OE sALEsvILLE, OHIO.

IMPROVEMENT IN NUT-LOCKS.

Specication forming part of Letters Patent No. 132,079, dated October 8,1872.

To all whom it may concern:

Be it known that I, GEORGE S. BILLARD, of Salesville, Guernsey county,lState of Ohio, have invented an Improved Lock for Nuts, of which thefollowing is a specification:

My invention relates to the confinement of a key interposed between thenut and the bolt upon which it is screwed in a recess cut in the one andthe other to receive it by means of a spring, so conined in a cavity inthe nut as to bear upon the key.

In the accompanying drawing, Figure 1 is a plan view of the nut and endof the bolt; Fig. 2, a transverse section in line x :c of Fig. 1; andFig. 3, a section in line y y of same figure.

A represents a nut; B, the bolt upon which the nut screws. The end ofthe bolt is provided with four opposite grooves, cl d l d, cutlongitudinally therein, as shown in Figs. 1 and 2, far enough and deepenough to receive a plain flat key, E, Fig. 2. This key consists of apiece of thin iiat metal, cut or stamped out in the form substantiallyas shown in Fig. 2. A circular or cylindrical hole, f, is bored in theface of the nut near to its inner periphery,

, as shown in Figs. 2 and 3, and a notch or seat is cut through from theupper end of the hole to the inner periphery of the nut, to receive theprojection c on the key, as shown in Fig.

2. H is a spiral spring inserted in the hole f in the nut, and whoseouter end projects and is bent to fit over the projecting head of thekey when it is ttedinto its seat, as shown in Figs. 2 and 3. The springwill be self-retained in the aperture f with sufficient pressure toresist any ordinary tension or the tension of the key for itswithdrawal.

The nut is locked upon the bolt by turning it until one of the groovesin the bolt is brought into register with the notch or keyseat in thenut, and then inserting they key into the groove in the bolt until itsprojecting head drops into the notch in the nut. When the key is thusinserted the end of the spring H will slip over it, and thereby securethe key in place. The key may be readily removed by slipping back thehead of the spring.

I claim as my invention- 1n combination with each other and With a nutand bolt, as described, a spring, H, seated in the nut, and arranged tobear upon a key, E, seated in the bolt and nut, to lock the samesubstantially as herein set forth.

Witness my hand hereto this 26th day of March, 1872.

GEORGE S. HILLARD.

Witnesses:

H. H. YOUNG, D. A. BURR.

